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Letters Patent No. 75,483, elated March 10, 1868.

'LMPROVEMENTTN LAMlD-BURNERS.

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TO `ALL PERSONS TO WHOM THESE PRESENTS MAY COME:

513e it known that T, Co-RNELIUS ST. JOHN, of Charlestown, in the countyof Middlesex, and State of Massachusetts, have inventeda new and usefulImprovement in Lamps; and I do hereby declare the same to be fully fdescribed in the following specification, and represented in theaccompanying drawings, of which- Figurel is a front elevation,

Figure 3 a side elevation, and

Figure 4 a vertical section of a lamp-burner provided with my invention.

l' Insuch drawings A denotes the wick-tube, B the cap-screw, and C theconical air-detiector and chimney. holder of' a lamp.

There is allixed to thc part C, which is foraminous or perforated, acup, D, whose sides, a a, and bottom, b, are perforated with numerousholes, the said bottom also being made with a hole or passage, e,1eading through it. This passa-go is for reception ofthe wick-tube, whichslides freely within andthrough' the bottom of the cup, and also in andthrough the cap-screw B, and may be provided with a. means or mechanismfor elevating or depressingr the wick within the tube. This mechanism isshown in the drawings 'as consisting of' two spurwheels, d d, and ashaft, e, vfor revolving them, such shaft having a milled head orbuttomf, fixed on one end oi' it, and being supported in bearings orprojections g g, extended from one side ofthe tube.'

The air-defiector and chimney-supporter C is to be supported on thccap-screw B by 'means ot' two standards, E E, or the equivalent thereof,the same being so that there may be a. clear or open space about thewick-tube and'underneath the chimney-supporter, in-ordcr that, withoutremoval of the chimney vor air-deieetor, ready access maybe had to thewiel: at the top of the wick-tube; when such top ot' such tube may bedepressed below the chimney-supporter, or the foraminous -cap D aihxedthereto. Thus, by my invention, the wick can be got at for being trimmedwithout thcnecessity of first removing the cone and chimney, or either,from the rest of the lamp. l I l i v Moreover, it will be seen that, bymeans of the foraminous cup D, the dame will be guarded from draughts ofair tendingA to cause it to dicker, and that the supply Iof air for thedeflector will pass through the-bottom and sides of the cup, but in casethe said bottom only be perforated., the air will pass through it. nthis way, vertical columns of air may be supplied tothe dame ofthe wick.

A brace, K, extended from the opposite edges of the wick-tube, to-andaround the two standards, may be employed to steady the tube while beingmoved eitherv up or down, the brace being adapted to the standards so asto be capable of being frcelyslid up and down onthem. A. horizontalsection, taken through the said brace, is shown ih tig. The chimneymay-be held upon its holder` by springs, l Z, or by other suitablemeans. By applying the hand to the shaft e, the wick-tube may bemovedvertically.

y I do not claim the mere application ofa wick-tube so as to' be capableof being moved vertically with respect to or towards and away from the'cone or air-delcctor of a lamp.

l I am aware' ofthe patent of M. B. Dyott, No. 37,281, dated January 6,1863, which covers a lamp-burner constructed of two parts, connectedtogether by slotted spiral arms and pins, the same bein-g' to admit ofthe raising .and lowering of the chimney, its -supporter andairfdeiicctor, with, respect to a stationary widk-tube. Iv-make `noclaim to this. My invcntionis a decided improvement with referencethereto, as in my lamp the chimneyand by means ofthe doviccsforraisingithc wick.

i In Dyotts lamp, the lingers of a person have to be applied tothechimney-supporter to revolve it in order to elevato it with reference'to the wick-tube. Such is liable to burn thcingers, as the supporter isgenerally quite het when the lamp is in'usc. By my construction thefingers are applied to the shaft e or its buttonfin order to efi'eet themovements ofthe wick-tube,- and this without any danger of burning them.Furthermore, I am obliged to make no rotary movement of thc'chimney,itssupporter, and air-clelector, in order to expose the top ofthewiclc-tube. Furthermore, my wick-tube is guided intol the part D by theguide part K.- Therefore,

supporter Aand air-dciiectorl are all stationary, the wick-tube beingmovable vertically with reference to them,

In combination with Athe wick-tube applied to the cap-screw orlamp-body,' so as to ige movable vertically, relatively to theair-deilector or chimney-supporter, substantially in manner asspecified; I claim the foraminous cup or guard D, made and arranged withthe cliiinney-support-er'and the air-dcector, substantially asspecified.

I also-claim the combination and arrangement of the guide K, with thestandards E E, and the chimneysupporter C, and the part D, appliedthereto as specified.

I also claim the improved lamp-burner as composed of the chimney-holdingsprings l Z, the chimneysupporting con@I and ar-deflector C, theperforated cup D, the standards E E, thc screw-cap B, and the wick-tubeA, and its guide K, arranged as described, and having the wick movablein the cap B and guide K, by means and in manner asdescribed.

CORNELIUS SILJOHN.

Witnesses:

R. H. EDDY, F. I. HALE, Jr.

